US3772488A - Device for temporary cutoff of electric loads in program switch mechanisms - Google Patents

Device for temporary cutoff of electric loads in program switch mechanisms Download PDF

Info

Publication number
US3772488A
US3772488A US00276382A US3772488DA US3772488A US 3772488 A US3772488 A US 3772488A US 00276382 A US00276382 A US 00276382A US 3772488D A US3772488D A US 3772488DA US 3772488 A US3772488 A US 3772488A
Authority
US
United States
Prior art keywords
coupling
program
claw
program switch
switch plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00276382A
Other languages
English (en)
Inventor
W Holzer
B Mehlan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
W Holzer and Co KG
Original Assignee
W Holzer and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by W Holzer and Co KG filed Critical W Holzer and Co KG
Application granted granted Critical
Publication of US3772488A publication Critical patent/US3772488A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/10—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19023—Plural power paths to and/or from gearing
    • Y10T74/19051—Single driven plural drives

Definitions

  • ABSTRACT An apparatus de-energizes electric loads which are controlled by a program switch mechanism by decoupling a program switch plate and a reversing switch plate which are driven from a motor drive source.
  • the de-coupling mechanism comprises a claw coupling member having two guide tracks mounted between the reversing and program switch plates and two claw rings. Movement of the program switch plate by more than one succeeding program step causes axial movement of a claw ring moving on one of the guide tracks. An overrun coupling causes the program switch plate to be rotated at a faster rate by engagement with another motor drive source.
  • Separation of the two claw rings causes the program switch plate to be driven at the faster rate and also causes axial movement of a shaft on which are mounted the program switch plate, the reversing switch plate, the claw coupling mechanism, and the overrun coupling mechanism so as to changeover a block contact to deenergize selected loads.
  • the invention relates to a device in program switch mechanisms having a program switch and a short program switch, for temporary cutoff of electric loads, preferably in washing machines, during the movement of the program switch by more than one immediately succeeding step which operates as a function of the operating states of a program switch and a short program switch.
  • German Patent No. 1,710,769 describes a program switch mechanism for automatic washing machines, wherein there is a drive motor which has a slidable rotor movable to various end positions according to the energization of the motor, and one of two drives is respectively coupled with rotor shaft.
  • the leaf spring which holds the rotor in its outer position is part of an auxiliary switch for an operating circuit of the washing machine.
  • the auxiliary switch can serve to cutoff different loads during fast over-running of two or more successive program steps, for example of a washing or dishwashing machine, during fast running or during a hand setting of the program switch mechanism. This is important because otherwise in going through a larger program section the load will be briefly connected, although this is not desirable at this particular point.
  • the blocking contact is to be switched on again at the end of the process within a specified time.
  • This problem is solved by placing a claw coupling provided with guide tracks between the program switching plate and the reversing switch plate.
  • the claw coupling has two claw rings, one of which executes an axial movement according to its guide track with movement of the program switch plate by more than one immediately successive step.
  • an overrun coupling which opens in both end positions of the claw coupling and is briefly closed upon relative rotational shifting of the two claw rings.
  • the invention has various advantages as compared to known devices. It works reliably even with a rotational shift of the program switch plate, which corresponds to a second step following immediately after a first step. Also, with manual setting of the program switch plate, the device works absolutely reliably.
  • the overrun coupling between the program switch and the short program switch has reliable wearing characteristics. Moreover, there is no annoying noise from the overrun coupling. Because of the essentially coaxial disposition of the whole device, it is especially compact.
  • FIG. 1 is a circuit diagram showing the function of a blocking contact
  • FIG. 2 illustrates a sectional view of an embodiment of the invention
  • FIG. 3a shows a sectional view of a guide curve for l a rolling body in an overrun coupling
  • FIG. 3b shows a guide track and associated claw ring of the claw coupling
  • FIG. 30 shows the guide track of the claw coupling as shown in FIG. 3b but with the coupling parts not spread.
  • An electric device for example a washing or dishwashing machine, is supplied from an electric network 21 (FIG. 1) with electric energy.
  • Different electric loads for example a fast running motor 16, an electromagnetic valve 17, a heating coil 18, a washing motor 19 and a pump 20, are switched on and off again by a program operated set of switch program contacts 23, 24, 25, 26 and 27.
  • program contacts 24, 25, 26 and 27 receive current via a supplementary contact 1, 2, 3 (a so-called blocking contact) which is normally closed but which can be opened in specific operational states. This occurs for example in shifting of the program switch during so-called fast operation,that is, when immediately successive program positions are overrun. Further, blocking contact 1, 2, 3 is opened if the program switch is set manually over more than one program step.
  • the motor movement of the program switch in fast operation can occur for example by means of a program dependent contact 23 (FIG. 1), which delivers current to a fast running motor 16.
  • a motor 15 is connected to the network 21 via a network contact 22 and assures the normal program course of a program switch mechanism.
  • program switch plate 32 for time dependent switching of the total program and reversing switch plate 28 for constant reversing of the direction of rotation of a washing motor are shown. It is apparent that other mechanisms such as rolls can also be used.
  • Reversing switch plate 28 is intended always to actuate reversing contact 34 during the washing program in a washing machine. Therefore, the reversing switch plate 28 for example via one or more drive gears 29 is driven by motor 15 in the direction of rotation that is indicated in FIG. 2. A coupling wheel 7 is in engagement with the reversing switch plate 28 and also runs in the direction of rotation shown in FIG. 2.
  • the program switch plate 32 is actuated stepwise by a kinematic device, which is not shown, which is directly driven by reversing switch plate 28 and by motor 15.
  • program switch plate 32 can be turned into a fast running position via coupling wheel 11, for example, by means of one or more drive wheels 30 and a coupling 31 of the fast running motor 16 (FIG. 2), which is not described in more detail as that mechanism is well known to those skilled in the art.
  • the two coupling wheels 7 and 11 run freely on an axially displaceable shaft 6 in a frame 33 and a housing 12.
  • a claw coupling that consists of two claw rings 8 and 9, of which one clawv ring 8 is rigidly connected with shaft 6 and fixed in rotation with coupling wheel 7 so that axial movements between coupling wheel 7 and claw ring 8 are possible.
  • the other claw ring 9 is rotatably borne on shaft 6 and additionally constitutes a cage for one or more rolling bodies, advantageously balls 10, which in specific operating states can bear on coupling wheel 11 and on guide track 37 of claw ring 8 (see also FIG. 3a).
  • a compression spring 36 which is supported on coupling wheel 7, the two claw rings 8 and 9 as well as coupling wheel 11 are pressed against housing 12.
  • the guide track 38 on claw ring 8 (FIG. 3b) is sensed by projection 9! (or a claw) on claw ring 9.
  • Guide track 38 makes it possible with specific relative movements of the two claw rings 8 and 9 to effect an axial movement of the claw rings.
  • apparatus for temporarily de-energizing electric loads during operation of said program switching mechanism at said at least one higher speed, comprising:
  • program means for controlling the time dependent switching of said program switching mechanism; switching means for de-energizing said electric loads; means for driving said program means at said given speed, including first coupling means connected to said switching means; means for driving said program means at said at least one higher speed, including a second coupling means engaging said program means; and
  • said first and second coupling means engaging with one another for periodically displacing said first coupling means to actuate said switching means, thereby de-energizing said electric loads.
  • Apparatus as in claim 1 further comprising means for disengaging sad first and second coupling means only during operation of said switching mechanism at said at least one higher speed.
  • first coupling means includes a cam member mounted thereto and said second coupling means includes cam follower means engaging said first cam means.
  • said first coupling means includes an axially movable rotatable shaft, a first coupling wheel mounted to said shaft, and further including means for mounting said cam member to said first coupling wheel enabling resilient displacement between said cam member and said first coupling wheel;
  • said second coupling means includes a second coupling wheelrotatably mounted to said shaft, and further including means for releasably engaging said cam follower with said second coupling wheel;
  • said switching means includes a pivotally mounted contact engaging said shaft.

Landscapes

  • Transmission Devices (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Mechanical Operated Clutches (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
US00276382A 1971-07-31 1972-07-31 Device for temporary cutoff of electric loads in program switch mechanisms Expired - Lifetime US3772488A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2138365A DE2138365C2 (de) 1971-07-31 1971-07-31 Programmschaltwerk

Publications (1)

Publication Number Publication Date
US3772488A true US3772488A (en) 1973-11-13

Family

ID=5815396

Family Applications (1)

Application Number Title Priority Date Filing Date
US00276382A Expired - Lifetime US3772488A (en) 1971-07-31 1972-07-31 Device for temporary cutoff of electric loads in program switch mechanisms

Country Status (5)

Country Link
US (1) US3772488A (OSRAM)
DE (1) DE2138365C2 (OSRAM)
FR (1) FR2148051B1 (OSRAM)
GB (1) GB1359434A (OSRAM)
IT (1) IT963526B (OSRAM)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151502A (en) * 1962-12-06 1964-10-06 King Of Prussia Res And Dev Co Multiple-input shaft-mounted drive
US3176811A (en) * 1960-08-09 1965-04-06 Dana Corp Torque responsive clutch device
US3313895A (en) * 1965-06-28 1967-04-11 Mallory & Co Inc P R Rapid advance and intermittent drive mechanism for a time sequence switch
US3373253A (en) * 1965-02-20 1968-03-12 Crouzet Sa Program switch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176811A (en) * 1960-08-09 1965-04-06 Dana Corp Torque responsive clutch device
US3151502A (en) * 1962-12-06 1964-10-06 King Of Prussia Res And Dev Co Multiple-input shaft-mounted drive
US3373253A (en) * 1965-02-20 1968-03-12 Crouzet Sa Program switch
US3313895A (en) * 1965-06-28 1967-04-11 Mallory & Co Inc P R Rapid advance and intermittent drive mechanism for a time sequence switch

Also Published As

Publication number Publication date
IT963526B (it) 1974-01-21
FR2148051B1 (OSRAM) 1977-04-01
FR2148051A1 (OSRAM) 1973-03-11
DE2138365C2 (de) 1975-01-30
GB1359434A (en) 1974-07-10
DE2138365B1 (de) 1973-01-18
DE2138365A1 (OSRAM) 1973-01-18

Similar Documents

Publication Publication Date Title
CN105336525B (zh) 一种用于开关设备的联锁装置及使用该联锁装置的开关柜
US3772488A (en) Device for temporary cutoff of electric loads in program switch mechanisms
GB790739A (en) Improvements in or relating to auto-transformer tap changers
US2825772A (en) Timer
JP2838956B2 (ja) 回路遮断器の電動操作装置
US3823281A (en) Draw-out type modular high voltage switchgear and compartment-motorized racking mechanism therefor
US3041480A (en) Driving means of an impulse device and stepping mechanism for program contacts
US2930941A (en) Punch card control system
US2300576A (en) Loop-automatic and manual drive
GB741814A (en) Improvements in or relating to press for shaping and curing pneumatic tires
US3227826A (en) Timer switch mechanism
US2034708A (en) Remote control apparatus
US2253557A (en) Combined limit switch and relay
DE625830C (de) Waschmaschine, insbesondere fuer die Chemischwaescherei
US2976377A (en) Switch construction and mechanism therefor
US2688718A (en) Motor reversing switch and system
US3001445A (en) Slide projector
US2254029A (en) Spindle press drive
CN206388616U (zh) 开关操作机构上的位置切换辅助信号结构
US3210487A (en) Apparatus comprising a timing mechanism and an intermittent switching mechanism
US3246090A (en) Stepping timer with normal and rapid advance speed control
GB1045166A (en) An arrangement for programme selector switches in electric washing machines
US2982900A (en) Timing device
US2786153A (en) Rotary step-by-step actuating mechanism
US3148288A (en) Arrangement and apparatus for operating fully automatic washing machines